Table 6. Comparison of prevalence of obesity and odds ratio for obesity in male smokers stratified by cigarettes smoked per day (CPD).
| Cochran-Mantel-Haenszel trend test | Multiple logistic regression | |||||||
|---|---|---|---|---|---|---|---|---|
| Smoking status | CPD | n | BMI | Prevalence of obesity (%) | P value† | Odds ratio* | 95% CI | P value |
| Current | ≤ 10 | 1002 | 22.5±3.2 | 19.4 | <0.001 | 0.68 | 0.57–0.81 | < 0.001 |
| 11–20 | 2540 | 22.9±3.2 | 22.1 | 0.75 | 0.66–0.84 | < 0.001 | ||
| 21–30 | 724 | 23.3±3.3 | 26.5 | 0.91 | 0.76–1.09 | 0.32 | ||
| 31–40 | 375 | 23.6±3.8 | 30.7 | 1.09 | 0.86–1.38 | 0.47 | ||
| 40 < | 91 | 24.5±3.9 | 38.5 | 1.56 | 1.01–2.39 | 0.047 | ||
| Past | ≤ 10 | 495 | 23.0±3.1 | 22.4 | <0.001 | 0.78 | 0.62–0.98 | 0.031 |
| 11–20 | 1322 | 23.3±2.9 | 25 | 0.9 | 0.78–1.04 | 0.15 | ||
| 21–30 | 379 | 23.6±3.0 | 28.8 | 1.1 | 0.87–1.39 | 0.42 | ||
| 31–40 | 283 | 24.0±3.5 | 31.8 | 1.26 | 0.97–1.64 | 0.09 | ||
| 40 < | 152 | 24.1±3.0 | 38.8 | 1.76 | 1.25–2.46 | 0.001 | ||
*Prevalence of obesity of never smokers was used as the reference value.
BMI, body mass index
†Each P value was calculated by Cochran-Mantel-Haenszel trend test among groups stratified by CPD in current or past smokers.